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LEE BOW EFFECT

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G.R.F. View Drop Down
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Post Options Post Options   Quote G.R.F. Quote  Post ReplyReply Direct Link To This Post Posted: 20 Oct 11 at 9:19pm
The illustration assumes the tide coming on during an existing course as an extreme example to make the point.

If it was already there, then maybe a race officer might move the mark, or


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Peaky View Drop Down
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Post Options Post Options   Quote Peaky Quote  Post ReplyReply Direct Link To This Post Posted: 20 Oct 11 at 8:46pm
It's the Coriolis effect
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Rupert View Drop Down
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Post Options Post Options   Quote Rupert Quote  Post ReplyReply Direct Link To This Post Posted: 20 Oct 11 at 7:35pm

I can see you'd get a curve if the tidal strengh changed over the course.

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G.R.F. View Drop Down
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Post Options Post Options   Quote G.R.F. Quote  Post ReplyReply Direct Link To This Post Posted: 20 Oct 11 at 7:12pm
You sail a curve, difficult to describe in a cheap drawing programme like that, but a time stop delay would make the point, you sail the course in sketch one, the tide moves the course sideways as you go progressively, so it's a curve described over the bottom, a straight line over the water maybe, the track is a curve, I'm wondering if I have some gps tracks somewhere that might even prove that, i shall have a look.

You may have got the point Rupert, but there are some ever so slightly retarded trolls here who don't or deliberately don't, whatever, it's all I'm going to be bothered with, I have more important things to do than to try and enlighten closed minds.. Nor after thirty five years and thousands of races in countless venues, am i going to be persuaded that I'm wrong, or my thinking on the matter is anything other than fact based.
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Post Options Post Options   Quote Presuming Ed Quote  Post ReplyReply Direct Link To This Post Posted: 20 Oct 11 at 6:20pm
Curves? I think Newton would have something to say about curves.
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Post Options Post Options   Quote Rupert Quote  Post ReplyReply Direct Link To This Post Posted: 20 Oct 11 at 6:09pm
GRF, we got the point on going the right side with the tide on page one. Since then the rest of us have been talking about what dinghy sailors know as the lee bow effect, which has nothing to do with what you have drawn at all.
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G.R.F. View Drop Down
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Post Options Post Options   Quote G.R.F. Quote  Post ReplyReply Direct Link To This Post Posted: 20 Oct 11 at 5:44pm
Not good enough 7 minutes between posts, plenty of time for that rogue sea monkey to log out and then back in again as another muppet...

Right, so seriously this will go round and round, here's my last sketch on the subject..



Sketch A) determines a stock windward leeward course with the outer boundaries of the lay lines all things being equal. Steady Wind No tide.

Sketch B) Along comes a tide from the Right which effectively we're all agreed moves the water playing field and goal posts to the left .  Indicated in Red is an approximate course two boats would sail, one going downtide the other going uptide, OK it's extreme and exaggerated  for illustration purposes, but it is what happens, I've seen it so often, lots and lots of times, by the time the boats (boards) who haven't clocked it have sailed left, by the time they come right they're having to bear away to get to the mark and the boats that went right, benefited by the tidal lee bow sail at best a short dogleg on their second tack by getting high enough to get the tide on their stern on the second tack.. now go tell that to your chums Perry et al. Have a word with one of your current Hero's Geoff Carveth, he's been about and taking a thrashing like a man when he once tried to step up to a mans version of competitive regatta sailing..






Edited by G.R.F. - 20 Oct 11 at 5:55pm
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rogue View Drop Down
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Post Options Post Options   Quote rogue Quote  Post ReplyReply Direct Link To This Post Posted: 20 Oct 11 at 3:59pm
Originally posted by seamonkey

... good luck on improving your 39th (4th last) in next years nationals ...


haven't you heard, he's going to come first...

I'm looking forward to my crewing invite at next year's Endeavour trophy representing the mighty V-Tv@t Class Association.    

edit- of course, we'll be showing 'y'all' about that lee bow effect... there's some interesting water up by the entrance of the Roach!

Edited by rogue - 20 Oct 11 at 4:04pm
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Post Options Post Options   Quote 2547 Quote  Post ReplyReply Direct Link To This Post Posted: 20 Oct 11 at 3:52pm
Originally posted by G.R.F.


You're beginning to look retarded..



... along with Stan Honey, Lowell North, Peter Isler, Dave Perry, Walker & Rushall ... I'm cool hanging out with those retards.

If only you could open your mind to some new learning to understand what you have experienced and let go of your incorrect assumptions you'd get it but as you are so pig headed you will stay where you are ...

I think it's time to respect the saying ... never argue with a fool ... good luck on improving your 39th (4th last) in next years nationals ...
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G.R.F. View Drop Down
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Post Options Post Options   Quote G.R.F. Quote  Post ReplyReply Direct Link To This Post Posted: 20 Oct 11 at 3:51pm
I'm going to have to finish with one last sketch...

I'll make it simple..

I'll draw it slooooowlly cos I know y'all can't read fast...
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